Hi
I need some help with my mame PC.
I ran mame32 on the system and its displays perfectly (as pictured below):

However when I run a frontend (mala/mamewah) it seems to mess the displayed image (shown below) all DK games look like this, vsSMB full screens but also does some crazy stuff with the image.


Originally I thought it was a display problem. Though when I screenshot the problem the screenshots show a perfect image.
So I thought it maybe a monitor problem, just tried a new monitor (lcd) same problem.
Anyone know of this problem? any suggestions if this is a graphics card problem or mame config? and how to fix it?